Chapter 11. Appendix 4 – Connector pin-outs

11.1 Ethernet

This is an Amphenol RJField-series 8P8C connector. It consists of a standard ISO 8877 8P8C modular socket (often called RJ45) in a bayonet mounting compatible with MIL-DTL-26482 (formerly MIL-C-26482).

When used in hostile environments, a standard Ethernet cable can have a mating environmental shield (Amphenol part number RJF6MN) fitted.

11.2 Power

This is a standard 4-pin military-specification bayonet plug, conforming to MIL-DTL-26482 (formerly MIL-C-26482).

Pin

Function

A

Ground

B

10-36 V DC input

C

not connected

D

not connected

Wiring details for the compatible socket as seen from the cable end (i.e. when assembling).

Caution: Observe the correct polarity when connecting the power supply. The red lead (from pin B) must be connected to the positive terminal, typically labelled ‘+’, and the black lead (from pin A) must be connected to the negative terminal, typically labelled ‘-’. An incorrect connection risks destroying the digitiser, the power supply and any connected instruments.

11.3 GPS/serial

This is a 14-pin LEMO EEG.1K socket. Suitable mating connectors can be found in the LEMO FGG.1K.314 range.

To engage the mating connector, line up the red marks and push firmly home.

To disengage, hold the mating connector by the gnarled outer sleeve and pull steadily.

Pin

Function

1

Ground

2

not connected

3

Ground

4

Debug (serial) receive

5

Debug (serial) transmit

6

not connected

7

GPS power

8

GPS pulse-per-second signal – positive

9

GPS receive- positive

10

GPS transmit – positive

11

GPS transmit – negative

12

not connected

13

GPS pulse-per-second signal – negative

14

GPS receive – negative

Wiring details for the compatible plug, FGG.1K.314.*, as seen from the cable end (i.e. when assembling).